The JORC Code 2012 (Clause 49)

Transcription

1 The JORC Code 2012 (Clause 49) Its significance for economic industrial mineral deposits MGEI 7th ANNUAL CONVENTION Indonesia s Mineral and Coal Resources: Discovery to Inventory Balikpapan Andrew Scogings, PhD Geology Principal Consultant, CSA Global Pty Ltd 4 October 2015

2 Setting the scene

3 JORC 2012 Clause 49 Presentation outline What are industrial minerals? The JORC Code 2012 Clause 49 (mineral specifications) Bentonite market examples and specifications Bentonite Resource example Graphite Resource example Conclusions.

4 Density General perspective of the industrial minerals space

5 JORC 2012 Clause 49 What are industrial minerals? Minerals and Rocks mined and processed for the value of their non-metallurgical properties Natural or synthetic Natural: Clays, sand, stone aggregate, talc, limestone, gypsum, feldspar, mica, chromite, graphite Synthetic: Calcium carbonate, soda ash, graphite.

6 JORC 2012 Clause 49 Where are industrial minerals used? Numerous everyday items. Incorporated in the final product, or used in the manufacturing process Glass & Ceramics - Clay, Silica, Limestone, Feldspar, Zircon, Soda Ash, Talc Paint & Plastic - Talc, GGC, Kaolin, Mica Wine, Beer, Fruit Juice - Diatomite, Perlite, Bentonite Table Salt - Halite Metal Casting - Silica Sand, Bentonite Cement - Limestone Batteries - Graphite Oil Drilling Barite, Bentonite.

7 JORC 2012 Clause 49 How important are markets? Without a market, an Industrial Mineral deposit is merely a geological curiosity Without a potential market, there can be no resource; without a good knowledge of the planned market (volume, price and competition), there is no reserve Border and Butt (2014).

8 The JORC Code2012 Clause 49

9 JORC Code (2004 vs 2012) Clause 44 &49

10 JORC Code (2012) Clause 49 For minerals that are defined by a specification, the Mineral Resource or Ore Reserve estimation must be reported in terms of the mineral or minerals on which the project is to be based and must include the specification of those minerals.

11 JORC Code (2012) Clause 49

12 JORC Code (2012) Clause 49

13 JORC Code (2012) Clause 49 Some industrial mineral specifications Industrial minerals are classified according to market specifications, which may include: mineralogy purity particle size distribution colour density thermal resistance, etc.

14 JORC Code (2012) Clause 49 Graphite price related to specifications (purity and flake size) Graphite type Purity Particle size Description Pricing method Price (% C) (Mesh) (US$ / tonne) Synthetic Ex-works Switzerland 7,000 20,000 Flake Large FCL, CIF European port 1,100 Flake Medium FCL, CIF European port 950 Flake Small FCL, CIF European port 775 Flake Large CIF, European port 800 Flake Medium FCL, CIF European port 750 Flake Small FCL, CIF European port 625 Amorphous Fine FCL China, CIF Europe 415

15 JORC Code (2012) Clause 49 Graphite price related to specifications (purity and flake size) Graphite type Purity Particle size Description Pricing method Price (% C) (Mesh) (US$ / tonne) Synthetic Ex-works Switzerland 7,000 20,000 Flake Large FCL, CIF European port 1,100 Flake Medium FCL, CIF European port 950 Flake Small FCL, CIF European port 775 Flake Large CIF, European port 800 Flake Medium FCL, CIF European port 750 Flake Small FCL, CIF European port 625 Amorphous Fine FCL China, CIF Europe 415

16 Bentonite market examples

17 Bentonite what is it? Clay derived from volcanic ash. Exchangeable cations Na, Ca, Mg Sandstone Tuff Ni laterite Bentonite 2m

18 Bentonite what is it? Bentonite generally mined opencast Ni laterite

19 Bentonite what is it? Bentonite and rhyolite Ni laterite

20 Bentonite markets Bentonite features Montmorillonite plus impurities such as quartz, feldspar, calcite, zeolite Absorbs water Swells when wet High surface area Natural glue or binder May retain structural water to >600 o C.

21 Bentonite markets Iron ore pellets (water absorption, green strength)

22 Bentonite markets Foundry sand (strength, thermal durability )

23 Bentonite markets Greensand mould Metal casting

24 Bentonite markets Geosynthetic clay lining of a basement (free swell, permeability)

25 Bentonite markets Geosynthetic clay lining of a tunnel (free swell, permeability)

26 Bentonite markets Cat litter (clump strength, odour absorption, colour)

27 Bentonite markets Drilling mud (viscosity, fluid loss and barrel yield)

28 Bentonite markets Edible oil purification (decolourising ability)

29 Bentonite markets Specification examples Drill grade ml Fluid Loss Drill grade ml Fluid Loss Geosynthetic liner <18 ml Fluid Loss, >24 ml Free Swell Iron ore pellets 1 >700% Water Plate Iron ore pellets % Water Plate Note that none of these specifications stipulate CEC, or purity of the clay. However some markets such as paper may require high CEC

30 Bentonite markets Bentonite test methods - examples 25 ml 32 ml Free Swell Viscosity & Fluid Loss Foundry Sand Strength Clump Strength

31 Bentonite markets Test methods Thermal durability

32 Sample testing Sample testing conclusions The JORC Code 2012 Clause 49 Assays may not always be relevant, and other quality criteria may be more applicable. If criteria such as deleterious minerals or physical properties are of more relevance than the composition of the bulk mineral itself, then they should be reported accordingly.

33 Bentonite resource example

34 Bentonite resource Cross section 2 metres thick

35 Bentonite resource Cation Exchange Capacity (meq) Depth to Bentonite (m) Drill collars (30m spacing)

36 Bentonite resource Moisture (%) Depth to Bentonite (m)

37 Bentonite resource Hypothetical Resource estimate based on CEC (~purity) 175,000 tonnes of bentonite at 25% moisture CEC = 80 meq/100g But this doesn t tell us what we can potentially use the clay for..therefore this is not a mineral resource according to Clause 49

38 Bentonite resource ph Depth to Bentonite (m)

39 Bentonite resource Free Swell (ml/2g) Depth to Bentonite (m)

40 Bentonite resource Unoxidised (blue) bentonite at depth Yellow bentonite Blue bentonite

41 Bentonite resource Oxidised (yellow) or unoxidised (blue) bentonite Blue bentonite

42 Bentonite resource Hypothetical resource estimate based on other parameters 175,000 tonnes of bentonite at 25% moisture CEC = 80 meq/100g Very high thermal durability and good bond strengths indicate that 100% can be used for foundry By the addition of soda ash and polymers, 75% can be used for drilling mud and geosynthetic clay liners None of the bentonite can be used for edible oil purification, paper manufacture or high yield drilling mud There are local and export opportunities This is a Mineral Resource in terms of Clause 49.

43 Product mix Product mix conclusions The JORC Code 2012 (Clause 49) Some industrial mineral deposits may be capable of yielding products suitable for more than one application and/or specification. If considered material by the reporting company, such multiple products should be quantified either separately or as a percentage of the bulk deposit.

44 Graphite example

45 Graphite resource Graphite resource example 20 Mt at 10% graphitic carbon Contains 2 Mt of in situ flake graphite However this tells us nothing about: Flake size distribution Flake purity How much graphite can be liberated from the rock Impurities that may impact on mineral processing How much market share we can get (total natural graphite produced in 2014 = 1.2 Mt).

46 Graphite production & markets 2014 Production China 825,000 Brazil 95,000 North Korea 70,000 Canada 30,000 India 24,000 Turkey 15,000 Mexico 15,000 Russia 14,000 Ukraine 12,000 Norway 8,000 Zimbabwe 7,000 Madagascar 5,000 Sri Lanka 4,000 Austria 1,000 Germany 1,000 1,126,000 t 10% 10% 25% 8% 11% 36% Refractories Batteries Metallurgy Lubricants Parts and components Others

47 Graphite refractory markets Product Flake Graphite quality (Carbon content) Flake size Magnesia / Dolomite Carbon bricks 90 to 95% < 100 to >50 mesh Alumina Magnesia Carbon bricks 92 to 94% < 100 mesh Isostatically pressed parts for steel making 90 to 99% < 100 to >50 mesh Graphite-containing crucibles 85 to 96% > 100 mesh Unshaped refractories. Carbon bonded mixes 85 to 94% > 100 mesh

48 JORC Code (2012) Clause 49 Graphite price related to specifications (purity and flake size) Graphite type Purity Particle size Description Pricing method Price (% C) (Mesh) (US$ / tonne) Synthetic Ex-works Switzerland 7,000 20,000 Flake Large FCL, CIF European port 1,100 Flake Medium FCL, CIF European port 950 Flake Small FCL, CIF European port 775 Flake Large CIF, European port 800 Flake Medium FCL, CIF European port 750 Flake Small FCL, CIF European port 625 Amorphous Fine FCL China, CIF Europe 415

49 Markets Product marketability conclusions The JORC Code 2012 Clause 49 It may be necessary, prior to the reporting of a Mineral Resource or Ore Reserve, to take particular account of certain key characteristics or qualities such as likely product specifications, proximity to markets and general product marketability.

50 Graphite geology Graphite deposits mostly in graphite schist opencast

51 Graphite geology Graphite deposits sometimes in graphite schist underground

52 Graphite resource Not all graphite can be recovered

53 Graphite resource Graphite mineral resource High and Low grade zones High grade >5% TGC Low grade >2% TGC

54 Graphite resource Low Grade Zone >2% cut-off High Grade Zone >5% cut-off

55 Graphite resource Oxide Zone - Jarosite, Clay, Opaline silica

56 Graphite resource Transitional Zone - Kaolinised sillimanite, pyrite

57 Graphite resource Fresh Zone Fe sulphides, unaltered sillimanite

58 Conclusions

59 Conclusions The JORC Code 2012 (Clause 49) Clause 49 of the JORC Code 2012 states that industrial mineral resources must be reported by specification If multiple products are possible within a deposit, such products should be identified and quantified Specific market-related testing is likely to be required when reporting an industrial mineral resource It is not sufficient to rely just on assays, as commonly used in metals resource reporting Proximity to markets, and general product marketability, should be considered in terms of eventual economic extraction.

60 Thank you The support of MGEI, CSA Global, IMX Resources, Kibaran Resources and AMCOL is gratefully acknowledged 4 October 2015